It is very important to analyze the microstructure of soil for keep away the groundsill fall down and distor-tion. After the soil samples are dried in the vacancy container, the toil degree image is taken under the electron micro-scope. As usual, the soil micro-image is processed with 2 D method. In that way, many characters of soil micro-im-age are loosed. In this paper we introduce how to realize the 3D reconstruction of soil micro-image using OpenGL. Bythis way, the 3D structure of image can be sighted directly. More stability gist can be found for judging that ground-sill has being reached the criterion of sinking whether or not.
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